class Student{
    public String name;
    public int age;
    public String setNum;
    public Student(){
        System.out.println("不带参数的构造方法......");
    }
//利用idea的高效开发效率，右键选生成，选择构造函数，直接生成。
    public Student(int age, String setNum, String name) {
        this.age = age;
        this.setNum = setNum;
        this.name = name;
        System.out.println("不带参数的构造方法......");
    }
}

public class Test {

    public static void main(String[] args) {
      Student student1 = new Student();
        Student student2 = new Student(19,"1234","zhangsan");


    }
}
